Carbureter float mechanism



R. M.. ANDERSON.

CARBURETER FLOAT MECHANISM.

APPLICATION FILED 1AN.12, 1920.

1 ,380,032. v Patented May 31,1921.

2 SHEETSSHEET I.

I N VEN TOR.

WITNESS:

R, M. ANDERSON. CARBURETER FLOAT MECHANISM.

APPLICATION FILED 1AN.12, 1920.

1,880,032. Patented May 31,1921.

2 SHEETS-SHEET 2- WITNESS: I :IN VEN TOR.

A BY

ATTORNEY. I

UNITED STATES PATENT OFFICE.

RAYMOND M. ANDERSON, or Damon, MICHIGAN, ASSIGNOR 'ro GEORGE a. noLLEY,

/ or nnrnorr, MICHIGAN.

GARIBURE'IEB. FLOAT MECHANISM.

Specification of Letters Patent.

Patented May 31, 1921.

' Application filed January 12, 1920. Serial No. 351,014.

To all whom it may concern.

Be it known that I RAYMOND M. ANDER- SON, citizen of the. Iilnited States, residing at Detroit, in the county of Wayne and State. of Michigan, have invented certain new and useful Improvements in Carbureter Float Mechanisms,'of which the following is a specification.

In carbureters at present built the float mechanism is needlesslyelaborate and expensive to build.

The particular float mechanism which is shown on accompanying drawings is an improvement of the device originally used on the early Panhard automobiles. The improvements refer to the means for looking the float mechanism in place for assembling the mechanism and for manufacturing the various parts so they may be made with the least expense.

Another object is to provide a U-shaped fulcrum pin. This U-shaped fulcrum pin replaces the separate pin's'heretofore used. The disadvantage with the separate pins was that, if they are riveted in place, the bearing is distorted, and a certain percentage of the float mechanisms so manufactured are rendered inoperative.

In order tomake a commercial proposition for assembling the float mechanism, it has been found necessary to make these two pins as one, in the form of the letter U, with one leg longer than the other, which automatically provides a locking device.

Figure I shows the conventionalform of Panhard float mechanism.

Fig. II shows the improved mechanism referred to above.

Figs. III and IV show details of the improved locking device.

Fig. V shows the piece which serves as the fulcrum pin for the mechanism.

' Fig. VI shows a stamping which serves as the fulcrum.

Fig. VII shows the needle seat.

Fig. VIII shoWs the fulcrum pinassembly.

Fig. IX shows a sectional elevation taken at right angles to the plane of the counter weights.

In Fig. I a conventional float mechanism is shown in which 1 is the float chamber, 2 is the float, 3 is the fuel entrance, 4 is the needle, 5 and 5 are the counter weight levers, 6 and 6 are the fulcrum of the levers 5 and'5, and.7.is the shoulder on the needle 4 with which the levers 5 and 5' engage.

Figs. II and III show the improved mechanism in detail 1, 2, 4, 5", 5", 6", 65, 7' are the parts corresponding to. those with similar numbers shown in Fig. 'I. 8 is the fulcrum plate which carries the fulcrums 6" and 6" which are stamped out, 9 is the sprin which locks the cover 10 to the float cham er 1, 11 and 11 are the recesses in the float chamber flange 12 which allows the spring 9 to engage with the float chamber 1.-

The upper needle guide 13 shoulders onto the cover 10 and is spun' into plate 8. The distance piece 14 separates-the cover 10 from plate 8. The cap 15 screws onto the guide 13 and protects the needle 4 from dust and dirt, and the small hole 16 extends through the cover 15. The spring 9 is locked in place between the plate 8 and the cover 10 by means of the distance piece 14..

Flg. IV shows the spring 9 in detail and Fig. V shows the fulcrum pin 17 which is provided with unequal legs to facilitate assembly, Fig. VI shows the fulcrum plate stamping 8 in plan, therecesses 18' and 18 are provided to give clearance for the spring 9, and the projection 19 to lock the fulcrum pin 17 in place. I

Fig. WI shows the fuel inlet 3' inwhich the needle seat 20 seats on the narrow shoulder 21 in the float chamber 1' and as the screw is provided with a heavy screw slot it is possible to seat the screw and to insure that it will not admit fuel except past the needle seat without the use of any washer.-

The assembly and installation of the above float mechanism in a float chamber is as follows: first the needle seat.20 is screwed into the fuel entrance 3" so as to seal in the narrow shoulder 21.

The float chamber cover 10, spring 9 and fulcrum plate stamping 8 are locked together by means of the upper needle guide 13 the end of which is spun over the fulcrum plate 8. The counter weight levers 5" and the slots 11 and 11 then by turning the float mechanism to the right it locks the float mechanism in position.

A projection 19 formed by upsetting the metal in the plate prevents any possibility of the U-shaped piece 17 working free. Fig. IX shows the said offset 17 engaging with the projection 19. In assembling the mechanism the U-shaped piece 17 is easily sprung over the projection 19.

What I claim is:

1. In a float mechanism for carbureters a needle, counter weight levers engaging with said needle, a stamping serving as a fulcrum plate, a cover, a piece serving as the needle guide which locks the fulcrum plate to the cover for the purpose described.

2. In a float mechanism for carbureters a needle, counterweight levers engaging with said needle, a needle guide, a float chamber" locking the fulcrum plate stamping and the cover together, said means serving as the needle guide. 7

4:- In a float mechanism for carbureters a needle, counter weight levers engaging with said needle, a float chamber cover a stamping serving as a fulcrum plate a U shaped fulcrum pin having unequal legs a piece serving as a needle guide and tolock the cover to the fulcrum plate stamping.

5. In a float mechanism for carbureters, a needle, counterweight levers engaging with said needle, a float chamber cover, a spring locked to said float chamber cover, a float chamber provided with an inwardly extending ledge, recesses within saidvledge for en- I gaging sald spring.

6. In a float mechanism for carbureters, a

float chamber, a needle, counterweight levers engaging with said needle, a plate having fulcra formed integral therewith, a float chamber oover,.a needle guide serving as the means for locking the cover to said plate, a flexible leaf spring held between the coverand the plate and projecting therefrom for the purposeof locking the cover to the float chamber.

7. In a carburetor float mechanism of the conventional (Panhard) type,-a U-sliaped fulcrum pin serving as the fulcra for the two counterweight levers.

8. In a float mechanism of the conventional (Panhard) type, a float chamber and a cover therefor, a leaf spring on the inner side of said cover, an inwardly projecting ledge within the float chamber having recesses therein through which the spring can be projected for engaging with the ledge for the purpose of locking the cover in place.

i In testimony whereof I atfix my signature.

RAYMOND M. ANDERSON. 

